Sedimentary record for exhumation of ultrahigh pressure (UHP) rocks in the northern Cordillera, British Columbia, Canada

D. Canil; M. Mihalynuk; C. Charnell

doi:10.1130/b25921.1

Sedimentary record for exhumation of ultrahigh pressure (UHP) rocks in the northern Cordillera, British Columbia, Canada

Geological Society of America Bulletin ◽

10.1130/b25921.1 ◽

2006 ◽

Vol 118 (9-10) ◽

pp. 1171-1184 ◽

Cited By ~ 6

Author(s):

D. Canil ◽

M. Mihalynuk ◽

C. Charnell

Keyword(s):

British Columbia ◽

Ultrahigh Pressure ◽

Sedimentary Record

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Sediment source and hydroclimatic inferences from glacial lake sediments: the postglacial sedimentary record of Lillooet Lake, British Columbia

Journal of Hydrology ◽

10.1016/0022-1694(94)90268-2 ◽

1994 ◽

Vol 159 (1-4) ◽

pp. 375-393 ◽

Cited By ~ 64

Author(s):

Joseph R. Desloges ◽

Robert Gilbert

Keyword(s):

British Columbia ◽

Lake Sediments ◽

Glacial Lake ◽

Sediment Source ◽

Sedimentary Record

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A record of Early Pleistocene glaciation on the Mount Edziza Plateau, northwestern British Columbia

Canadian Journal of Earth Sciences ◽

10.1139/e95-158 ◽

1995 ◽

Vol 32 (12) ◽

pp. 2046-2056 ◽

Cited By ~ 14

Author(s):

I. S. Spooner ◽

G. D. Osborn ◽

R. W. Barendregt ◽

E. Irving

Keyword(s):

British Columbia ◽

Lacustrine Sediments ◽

Early Pleistocene ◽

Volcanic Complex ◽

Pleistocene Glaciation ◽

Sedimentary Record ◽

Basalt Flow ◽

Glacial Ice ◽

Normal Polarity

Mount Edziza is a Plio-Pleistocene volcanic complex that is located in the Stikine Terrane in northwestern British Columbia. A sequence of diamictites preserved between Ice Peak Formation basalts on the northwestern blank of Mount Edziza records an Early Pleistocene regional glaciation. The lowest Ice Peak Formation basalt flow (IP1; about 1 Ma) was probably extruded onto glacial ice because it is deformed and brecciated, it is pillowed at the base, it lies directly on hyaloclastite deposits, and there is a lack of fluvial and lacustrine sediments at the base. Fabric measurements from the underlying diamictites are consistent with lodgement processes and indicate northwest and southwest transport directions. These data, and an abundance of striated exotic cobbles, indicate that the sediment was deposited by Coast Mountain ice. Radiometric, paleomagnetic, and stratigraphic data all support the interpretation that diamictites at the section are the sedimentary record of an Early Pleistocene (about 1.1 Ma, isotope stage 32–34) regional glaciation(s). The normal paleomagnetic polarity of one of the Ice Peak Formation basalts (IP2) records extrusion during the Jaramillo normal polarity subchron (1.07–0.99 Ma) and further constrains the age of the underlying diamictites.

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